[PATCH v3 2/2] drm/fsl-dcu: add support for drm bridge

[Meng Yi]

The current output code only supports connection to drm panels.
Add code to support drm bridge, to support connections to
external connectors.

Signed-off-by: Meng Yi <meng.yi at nxp.com>
---
Changes since V1:
-no change
---
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
index 2e71f4b..e875b4e 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
@@ -189,6 +189,7 @@ err_cleanup:
 static int fsl_dcu_attach_endpoint(struct fsl_dcu_drm_device *fsl_dev,
 				const struct of_endpoint *ep)
 {
+	struct drm_bridge *bridge;
 	struct device_node *np;
 	int ret;
 
@@ -201,7 +202,17 @@ static int fsl_dcu_attach_endpoint(struct fsl_dcu_drm_device *fsl_dev,
 		return ret;
 	}
 
-	return -ENODEV;
+	bridge = of_drm_find_bridge(np);
+	of_node_put(np);
+	if (!bridge)
+		return -ENODEV;
+
+	fsl_dev->encoder.bridge = bridge;
+	bridge->encoder = &fsl_dev->encoder;
+
+	ret = drm_bridge_attach(fsl_dev->drm, bridge);
+
+	return ret;
 }
 
 int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
-- 
2.1.0.27.g96db324